Orchid doctor

HUMIDITY: Maintaining it with a "gadget"

Culture Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 3 years ago.

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A canvas soaker hose fastened to the top row of the finned heating pipes and with a slight flow of water leaking from it raised the humidity of a test area from 20% to 60%. A59-514
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More The Orchid Doctor Articles under the Heading Humidity

Humidity Comments
HUMIDITY: Additional Amount Applied to Cattleyas Do not use a tank-like enclosure; partially enclose the plant; if leaves are firm use a tray with pebbles and place the plant on it; if the room is dry add a humidifier. A70-235 0
HUMIDITY: Altitude Difference At sea level, which is where the phalaenopsis mostly grow, 100% relative humidity means a lot more water vapour per unit volume of air than at an altitude higher up, so there is a vast difference between 100% at sea level and 100% at 10,000 feet where the masdevallias thrive. OR82-27; A81-793 0
HUMIDITY: For Cattleyas Set the humidifier at 70% relative humidity if the humidistat is reliable, and sensitive; set at 60% to 70% on one that is not. A65-438; phalaenopsis and cattleyas. A80-630 0
HUMIDITY: How to Lower It An air conditioner is needed, but plants prefer high humidity, with good air movement and with fans acting against condensation, which might favor the development of disease A67-139 0
HUMIDITY: Maintaining it The relative ineffectiveness of "damping down" compared with using misters; at 5,000 feet altitude or more the amount of water carried by the air can be about one-third reduced; to maintain it in the greenhouse various devices are available, such as a time-switch, a micronic timer, a solenoid valve, atomising water-jets, etc., refer to OR87-120 0
HUMIDITY: Measurements and Accuracy The often inaccurate needle-and-dial hygrometer can be calibrated in a jar using common chemical saturated solutions of known % relative humidity at 25 dC. A80-1382 0
HUMIDITY: New System Install a fan on the floor pointing upwards, with overhead water sprays not directed onto the- plants, so that humidity is increased to about 907o relative; this produces increased growth and no losses; refer to A85-960 0
HUMIDITY: Providing it Automatically One system uses three mist sprays per nine feet of length on each side of the greenhouse, activated by means of a solenoid valve controlled by a humidistat sensor; the standard hook-up. OR85-418 0

New Topics

  1. Kevin Fernandez asked question Yellow leaves in category General Discussion
  2. Karen Kaye asked question details for care. Food, fan location etc in category General Discussion
  3. 2016 11 03 Jeanne M Uzar asked question Looking for Plant Identification in category General Discussion
  4. John Small asked question One And The Same? in category General Discussion
  5. Ashley Matherne asked question orchid search in category Cattleya Alliance

New Comments

  1. 2016 11 03 Jeanne M Uzar commented on topic "Looking for Plant Identification" by Jeanne M Uzar
  2. Image Carol Holdren commented on topic "Yellow leaves" by Kevin Fernandez
  3. Image Carol Holdren commented on topic "details for care. Food, fan location etc" by Karen Kaye
  4. Edward Zapata commented on topic "Help with ID, Please & Than You! " by Elizabeth Padilla
  5. 2016 11 03 Jeanne M Uzar commented on member plant Bulb. Crownpoint by Jeanne M Uzar
  6. Image Carol Holdren commented on topic "One And The Same?" by John Small
  7. Image Carol Holdren commented on member plant Rth. Lemon Drop by Christopher Dolan
  8. John Small commented on orchid Eny. Golden Sunburst
  9. Image Carol Holdren commented on topic "orchid search" by Ashley Matherne
  10. Edward Zapata commented on member plant C. purpurata var. Flamea x sanguinea by Carol Holdren